On 23 déc, 15:18, Vishal <vishal.santo...@gmail.com> wrote:
> I have an html page on a loaded on  xxx.somedomain:301/some.html
>
> This html has
> <script type="text/javascript" language="javascript" src="http://
> yyy.somedomain:301/g-control/gwtc/z/z.nocache.js">
>             document.domain = 'somedomain:301';
>   </script>

Well, first, this "document.domain" thing won't be executed, it has to
be in a separate <script> element (you cannot have both a src="" and
inline script). And it would actually have no effect in your case.

> and thus has to load up a GWT generated nocache.js.
> I have the
>     <add-linker name="xs"/>
> added to the GWT.xml to allow Cross Domain Scripting.
>
> I am able to execute the nocache.js , but any RPC fail with
>
> com.google.gwt.http.client.RequestPermissionException:
> The URLhttp://yyy.somedomain:301/g-control/actionservice.foundation
> is invalid or violates the same-origin security restrictionCaused by:
> com.google.gwt.http.client.RequestException:
>
> What am I doing wrong here ?

It just cannot work that way.You'd have to make requests to
xxx.somedomain:301 (either hosting your RPC servlets on xxx.somedomain
or setting up a "proxy" on xxx.somedomain to relay requests to
yyy.somedomain); the "xs" linker only allows you to load the GWT app
from another domain, but it doesn't bypass the Same-Origin Policy.
See 
http://code.google.com/webtoolkit/doc/latest/FAQ_Server.html#What_is_the_Same_Origin_Policy,_and_how_does_it_affect_GWT?

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